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ogdoad

American  
[og-doh-ad] / ˈɒg doʊˌæd /

noun

  1. the number eight.

  2. a group of eight.


ogdoad British  
/ ˈɒɡdəʊˌæd /

noun

  1. a group of eight

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ogdoad

1615–25; < Late Latin ogdoad- (stem of ogdoas ) < Greek ogdoás, derivative of ógdoos eighth; see -ad 1

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